Plastic machineries supplies bag opening devices manufactured to suit asbestos cement industries. The raw asbestos containing fibre bags are handled automatically in a totally enclosed atmosphere without allowing any dust outside. The bags are slit open, the contents are discharged into lump breaker, wherein the lumps breaker breaks the lumps, and fibre is loosened. The empty bags can also be shred into fine particles using our range of bag shredders. The power requirement for operating the device is very less as most of the functioning is based of pneumatic power. For controlling the operations of the device a control panel and an operator pendent is provided. The bag opening devices are a very good alternative to manual labour for handling material filled bags.